I would not recommend this company based on my experience. I rent a home and my AC was having a problem keeping up with the summer heat. Set it to 76° and between 2-6 pm the AC runs without pause and the temp continues to rise to 83-84°. This continued and was documented via my Ecobee 3 smart thermostat.
I called my owner who called Maxon. He did this because they had serviced his AC during a Home Warranty call a few years back. Upon arrival, the Maxon Air rep looked at smart thermostat and immediately began blaming it for the issues and stating he didn't understand computers. I showed him basic line graphs that show desired temp and actual measured internal temps (demonstrating that the AC couldn't keep up). He refused to even try and understand them. Additionally, he showed up in the morning and said it was cool - of course it was - the outside temp was 79° as opposed to 115°.
The Maxon Air rep tested the AC and said everything was fine. When it came time to look at the air handler in the attic he told me he hated those ladders that fold down - they make him feel unsafe. At this point I honestly didn't expect much.
He departed, after telling my owner that nothing was wrong. To my owners credit, he called AZ Eddy's AC. Bob Eddy arrived and in the span of 60 minutes diagnosed a problem using the same tests that Maxon had used. He fixed it and it is working great months later.
I have no idea why Maxon couldn't identify the issue. To prevent from a warrantied repair? Lack of training? Stupidity? Who knows. Call AZ Eddy instead.